<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>sessionStorage.html</title>
</head>
<body>
<h2>sessionStorage</h2>
<button onclick="saveData()">点我保存一个数据</button>
<button onclick="readData()">点我读取一个数据</button>
<button onclick="deleteData()">点我删除一个数据</button>
<button onclick="deleteAllData()">点我清空</button>

<script type="text/javascript">
    let p = {name: '张三', age: 18}

    function saveData() {
        sessionStorage.setItem("name", "jiale")
        sessionStorage.setItem("age", 22)
        sessionStorage.setItem("person", JSON.stringify(p))
    }

    function readData() {
        console.log(sessionStorage.getItem("name"))
        console.log(sessionStorage.getItem("age"))
        console.log(JSON.parse(sessionStorage.getItem("person")))
    }

    function deleteData() {
        sessionStorage.removeItem("name")
        sessionStorage.removeItem("age")
        sessionStorage.removeItem("person")
    }

    function deleteAllData() {
        sessionStorage.clear()
    }
</script>
</body>
</html>